--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/Range.java	Thu Apr 25 15:23:37 2013 +0200
@@ -0,0 +1,65 @@
+package org.dive4elements.river.artifacts.model;
+
+import java.io.Serializable;
+
+/** A range from ... to .*/
+public class Range implements Serializable {
+
+    public static final double EPSILON = 1e-5;
+
+    protected double start;
+    protected double end;
+
+    public Range() {
+    }
+
+    public Range(Range other) {
+        start = other.start;
+        end   = other.end;
+    }
+
+    public Range(double start, double end) {
+        this.start = start;
+        this.end   = end;
+    }
+
+    public double getStart() {
+        return start;
+    }
+
+    public double getEnd() {
+        return end;
+    }
+
+    public boolean disjoint(double ostart, double oend) {
+        return start > oend || ostart > end;
+    }
+
+    public boolean disjoint(Range other) {
+        return start > other.end || other.start > end;
+    }
+
+    public boolean intersects(Range other) {
+        return !disjoint(other);
+    }
+
+    public void extend(Range other) {
+        if (other.start < start) start = other.start;
+        if (other.end   > end  ) end   = other.end;
+    }
+
+    public boolean clip(Range other) {
+        if (disjoint(other)) return false;
+
+        if (other.start > start) start = other.start;
+        if (other.end   < end  ) end   = other.end;
+
+        return true;
+    }
+
+    /** True if start>x<end (+ some epsilon) . */
+    public boolean inside(double x) {
+        return x > start-EPSILON && x < end+EPSILON;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :